/*
 * Hubnoise — CSS strutturale.
 *
 * Solo struttura e leggibilità: la direzione visiva si definisce a parte, dopo
 * la F4 (CLAUDE.md §10). Niente colori di marca, niente decorazione.
 */

:root {
  --hn-space: 1rem;
  --hn-space-lg: 2.5rem;
  --hn-measure: 68ch;
  --hn-border: #d8d8d8;
  --hn-muted: #5c5c5c;
  --hn-bg-soft: #f6f6f4;
  --hn-radius: 4px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: #1b1b1b;
  background: #fff;
}

img,
video,
iframe {
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
}

/* ---------------------------------------------------------------- struttura */

.site-header,
.site-footer,
.site-main {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--hn-space);
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  gap: var(--hn-space);
  align-items: baseline;
  justify-content: space-between;
  padding-block: var(--hn-space);
  border-bottom: 1px solid var(--hn-border);
}

.site-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.site-title a {
  text-decoration: none;
}

.site-footer {
  margin-top: var(--hn-space-lg);
  padding-block: var(--hn-space-lg);
  border-top: 1px solid var(--hn-border);
  color: var(--hn-muted);
}

.nav-primary,
.nav-footer {
  display: flex;
  flex-wrap: wrap;
  gap: var(--hn-space);
  margin: 0;
  padding: 0;
  list-style: none;
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  position: static;
  display: inline-block;
  padding: 0.5rem;
}

.screen-reader-text:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ------------------------------------------------------------------ schede */

.hn-scheda {
  padding-block: var(--hn-space-lg);
}

.hn-scheda__header {
  margin-bottom: var(--hn-space-lg);
}

.hn-scheda__title {
  margin: 0 0 0.25em;
  font-size: clamp(1.75rem, 1.2rem + 2vw, 2.75rem);
  line-height: 1.15;
}

.hn-scheda__kicker,
.hn-scheda__subtitle,
.hn-scheda__meta {
  margin: 0 0 0.5em;
  color: var(--hn-muted);
}

.hn-scheda__meta > * + *::before {
  content: " · ";
}

.hn-scheda__logo img {
  max-height: 120px;
  width: auto;
}

.hn-scheda__columns {
  display: grid;
  gap: var(--hn-space-lg);
  align-items: start;
}

@media (min-width: 60rem) {
  .hn-scheda__columns {
    grid-template-columns: 1fr 1fr;
  }

  .hn-scheda--reverse .hn-scheda__columns {
    direction: rtl;
  }

  .hn-scheda--reverse .hn-scheda__columns > * {
    direction: ltr;
  }

  .hn-scheda--filo-rosso .hn-scheda__columns {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  }
}

.hn-prose {
  max-width: var(--hn-measure);
}

.hn-prose > :first-child {
  margin-top: 0;
}

/* ---------------------------------------------------------------- sezioni */

.hn-section + .hn-section {
  margin-top: var(--hn-space-lg);
}

.hn-section__title {
  margin: 0 0 var(--hn-space);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--hn-muted);
}

.hn-gallery__list,
.hn-media__list,
.hn-list__items {
  display: grid;
  gap: var(--hn-space);
  margin: 0;
  padding: 0;
  list-style: none;
}

.hn-gallery__list {
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

.hn-list__items {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

figure {
  margin: 0;
}

figcaption {
  margin-top: 0.35em;
  font-size: 0.875rem;
  color: var(--hn-muted);
}

.hn-media__embed iframe {
  aspect-ratio: 16 / 9;
  width: 100%;
  height: auto;
}

/* ------------------------------------------------------------------ termini */

.hn-terms {
  display: flex;
  flex-wrap: wrap;
  gap: var(--hn-space);
  font-size: 0.9rem;
}

.hn-terms__group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35em;
  align-items: baseline;
}

.hn-terms__label {
  color: var(--hn-muted);
}

.hn-terms__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35em;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hn-terms__item:not(:last-child)::after {
  content: ",";
}

/* -------------------------------------------------------------------- card */

.hn-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  border: 1px solid var(--hn-border);
  border-radius: var(--hn-radius);
  overflow: hidden;
}

.hn-card__media img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.hn-card__body {
  padding: var(--hn-space);
}

.hn-card__title {
  margin: 0 0 0.25em;
  font-size: 1.05rem;
}

.hn-card__title a {
  text-decoration: none;
}

.hn-card__meta,
.hn-card__summary,
.hn-card__price {
  margin: 0 0 0.4em;
  font-size: 0.9rem;
  color: var(--hn-muted);
}

/* ---------------------------------------------------------------- archivi */

.hn-archive__header {
  padding-block: var(--hn-space-lg) var(--hn-space);
}

.hn-archive__title {
  margin: 0;
  font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.4rem);
}

/* Due colonne da tablet in su, una sola sotto: i filtri restano in cima. */
.hn-archive {
  display: grid;
  gap: var(--hn-space-lg);
  align-items: start;
}

@media (min-width: 56rem) {
  .hn-archive {
    grid-template-columns: minmax(230px, 270px) minmax(0, 1fr);
  }

  .hn-archive__sidebar {
    position: sticky;
    top: var(--hn-space);
    max-height: calc(100vh - 2 * var(--hn-space));
    overflow-y: auto;
    overscroll-behavior: contain;
  }
}

/* Il pannello è un <details>: su mobile si chiude, su desktop resta aperto. */
.hn-archive__panel {
  border: 1px solid var(--hn-border);
  border-radius: var(--hn-radius);
  background: var(--hn-bg-soft);
}

.hn-archive__panel-toggle {
  padding: 0.7rem var(--hn-space);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.hn-archive__panel-toggle::-webkit-details-marker {
  display: none;
}

.hn-archive__panel-toggle::after {
  content: " ▾";
  color: var(--hn-muted);
}

.hn-archive__panel[open] .hn-archive__panel-toggle::after {
  content: " ▴";
}

@media (min-width: 56rem) {
  .hn-archive__panel-toggle {
    display: none;
  }
}

/* ------------------------------------------------------------------ filtri */

.hn-filters {
  display: grid;
  gap: 1px;
  background: var(--hn-border);
  border-top: 1px solid var(--hn-border);
}

@media (min-width: 56rem) {
  .hn-filters {
    border-top: 0;
  }
}

.hn-filters__group {
  padding: 0.85rem var(--hn-space);
  background: var(--hn-bg-soft);
  border: 0;
  margin: 0;
}

.hn-filters__legend {
  display: block;
  width: 100%;
  padding: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--hn-muted);
}

details.hn-filters__group > .hn-filters__legend {
  cursor: pointer;
  list-style: none;
}

details.hn-filters__group > .hn-filters__legend::-webkit-details-marker {
  display: none;
}

details.hn-filters__group > .hn-filters__legend::after {
  content: "+";
  float: right;
  font-size: 0.95rem;
  line-height: 1;
}

details.hn-filters__group[open] > .hn-filters__legend::after {
  content: "–";
}

.hn-filters input[type="search"],
.hn-filters input[type="number"],
.hn-filters select {
  width: 100%;
  padding: 0.45em 0.6em;
  font: inherit;
  background: #fff;
  border: 1px solid var(--hn-border);
  border-radius: var(--hn-radius);
}

/* Nei gruppi non richiudibili l'etichetta sta sopra al campo. */
.hn-filters__group:not(details) > .hn-filters__legend {
  margin-bottom: 0.4em;
}

/* Ricerca live: lo spinner vive dentro il campo. */
.hn-search {
  position: relative;
}

.hn-search__spinner {
  position: absolute;
  top: 50%;
  right: 0.55em;
  width: 0.9em;
  height: 0.9em;
  margin-top: -0.45em;
  border: 2px solid var(--hn-border);
  border-top-color: var(--hn-muted);
  border-radius: 50%;
  animation: hn-spin 0.7s linear infinite;
}

.hn-search__spinner[hidden] {
  display: none;
}

@keyframes hn-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hn-search__spinner {
    animation-duration: 2s;
  }
}

/* Prezzo: due estremi affiancati. */
.hn-price {
  display: flex;
  gap: 0.4em;
  align-items: center;
  margin-top: 0.4em;
}

.hn-price__field {
  flex: 1 1 0;
  min-width: 0;
}

.hn-price__sep,
.hn-price__currency {
  color: var(--hn-muted);
}

/* Elenco di caselle: scorre se i termini sono tanti. */
.hn-filters__checks {
  max-height: 15rem;
  margin: 0.5em 0 0;
  padding: 0;
  overflow-y: auto;
  list-style: none;
}

.hn-filters__check {
  display: flex;
  gap: 0.45em;
  align-items: baseline;
  padding: 0.2em 0;
  font-size: 0.92rem;
  cursor: pointer;
}

.hn-filters__check-label {
  flex: 1 1 auto;
}

.hn-filters__count {
  color: var(--hn-muted);
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
}

.hn-filters__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  padding: 0.85rem var(--hn-space);
  background: var(--hn-bg-soft);
}

.hn-filters__actions[hidden] {
  display: none;
}

/* --------------------------------------------------------------- risultati */

.hn-results {
  position: relative;
  min-height: 12rem;
  transition: opacity 0.15s ease;
}

.hn-results[aria-busy="true"] {
  opacity: 0.45;
}

.hn-results__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6em var(--hn-space);
  align-items: baseline;
  margin-bottom: var(--hn-space);
  padding-bottom: 0.6em;
  border-bottom: 1px solid var(--hn-border);
}

.hn-results__count {
  margin: 0;
  color: var(--hn-muted);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.hn-results__empty {
  padding: var(--hn-space-lg) 0;
  color: var(--hn-muted);
}

/* Pillole dei filtri attivi. */
.hn-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hn-chip {
  display: inline-flex;
  gap: 0.4em;
  align-items: center;
  padding: 0.15em 0.6em;
  font-size: 0.85rem;
  text-decoration: none;
  background: var(--hn-bg-soft);
  border: 1px solid var(--hn-border);
  border-radius: 999px;
}

.hn-chip:hover,
.hn-chip:focus-visible {
  border-color: var(--hn-muted);
}

.hn-chip__x {
  color: var(--hn-muted);
  font-size: 1.05em;
  line-height: 1;
}

.hn-chips__reset {
  font-size: 0.85rem;
  color: var(--hn-muted);
}

.hn-pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  margin-top: var(--hn-space-lg);
}

.hn-pagination .page-numbers {
  padding: 0.25em 0.7em;
  text-decoration: none;
  border: 1px solid var(--hn-border);
  border-radius: var(--hn-radius);
}

.hn-pagination .page-numbers.current {
  border-color: currentColor;
  font-weight: 700;
}

/* --------------------------------------------------------------- pulsanti */

.hn-button {
  display: inline-block;
  padding: 0.45em 1em;
  font: inherit;
  color: #fff;
  text-decoration: none;
  background: #1b1b1b;
  border: 1px solid #1b1b1b;
  border-radius: var(--hn-radius);
  cursor: pointer;
}

.hn-button:hover,
.hn-button:focus-visible {
  background: #000;
}

/* ------------------------------------------------------------------ moduli */

.hn-form {
  display: grid;
  gap: var(--hn-space);
  max-width: var(--hn-measure);
}

.hn-form__field label {
  display: block;
  margin-bottom: 0.25em;
  font-weight: 600;
}

.hn-form__field input,
.hn-form__field textarea {
  width: 100%;
  padding: 0.5em;
  border: 1px solid var(--hn-border);
  border-radius: var(--hn-radius);
  font: inherit;
}

.hn-form__pot {
  position: absolute;
  left: -9999px;
}

.hn-notice {
  padding: var(--hn-space);
  border-left: 4px solid var(--hn-muted);
  background: var(--hn-bg-soft);
}

.hn-notice--error {
  border-left-color: #b3261e;
}

/* ------------------------------------------------------------------ cookie */

.hn-cookie {
  position: fixed;
  inset-inline: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  gap: var(--hn-space);
  align-items: center;
  justify-content: space-between;
  padding: var(--hn-space);
  background: #1b1b1b;
  color: #fff;
}

.hn-cookie a {
  color: inherit;
}

.hn-cookie[hidden] {
  display: none;
}

/* ---------------------------------------------------------------- il filo */

/*
 * "Segui il filo": il rimando che compare sulle schede citate da un articolo
 * del Filo Rosso. Deve saltare all'occhio senza urlare — è un invito a
 * cambiare pagina, non il contenuto principale.
 */
.hn-filo {
  margin-top: var(--hn-space-lg);
  padding: var(--hn-space);
  border: 1px solid var(--hn-border);
  border-left: 3px solid #b3261e;
  border-radius: var(--hn-radius);
  background: var(--hn-bg-soft);
}

.hn-filo__label {
  margin: 0 0 0.4em;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #b3261e;
}

.hn-filo__list {
  display: grid;
  gap: 0.3em;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hn-filo__link {
  display: inline-flex;
  gap: 0.5em;
  align-items: baseline;
  text-decoration: none;
  font-weight: 600;
}

.hn-filo__title {
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.hn-filo__arrow {
  transition: transform 0.15s ease;
}

.hn-filo__link:hover .hn-filo__arrow,
.hn-filo__link:focus-visible .hn-filo__arrow {
  transform: translateX(0.2em);
}

@media (prefers-reduced-motion: reduce) {
  .hn-filo__arrow {
    transition: none;
  }
}

/* Il filo visto dall'articolo: l'elenco di ciò che mette in relazione. */
.hn-thread__intro {
  margin: 0 0 var(--hn-space);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #b3261e;
}

.hn-thread .hn-list__items {
  grid-template-columns: 1fr;
}